As part of IYREF 2025, which carries the grand theme "Advancing Sustainable Energy for a Resilient World," this Business Case Competition invites D3, D4, and undergraduate (S1) students across Indonesia to participate in designing innovative business models that accelerate the green energy transition. Under the theme "Financing the Green Future: Building Business Models for Sustainable Energy" the competition aims to uncover creative ideas for developing financing systems, incentives, and investment strategies that enable broader and faster adoption of renewable energy in Indonesia. Participants are encouraged to contribute solution that are not only innovative and sustainable but also feasibl and impactful, driving real progress toward Indonesia’s energy future.